Lock and latch



(Modem 3 sheets-sheet 1.

F. KEIL. LOCK AND LATCH.

No. 246,145. Patfmted Aug. 23.1881.

IN VENTOR I ATTORNEYS.

N, PUERS, Phewmnagmpner. was

(Model.)

Fl- KEIL. 3 Sheets-Sheet 2.'

. LOCK AND LATCH. No. 246,145.

Patented Aug. 23, 188.1..

INVENTOR:

wITNEssBs ATTORNEYS.

N. PUERS. Plmumugmpher, wnshingwn. nc.

3 Sheets-Sheet 3.

TT/VBNTOR: M// BY /Lww ATTORNEYS.

(Model.)

F. KEIL.

LOCK AND LATCH. d 0.246,145. Patented Aug. 23,1881.

Ilya WITNBSSES.-

Nrrn Starks arnNT Unsinn.

FRANCIS KEIL, OF NEI/V YORK, N. Y.

LOCK AND LATCH.

SPECIFICATION forming' part of Letters Patent No. 246,145, dated .August23, 1881. Application nien April 23, resi. (Model.)

To all whom it may concern.-

Be it known that I, FRANCIS KEIL, of the city, county, and State ot' NewYork, have invented a new and useful Improvement in Door Locks andLatches, of which the following is a specification.

My improvements relate to the class known as front-door locks,77 inwhich the lockingbolt, latch and night-latch mechanismr are combined ina single case.

The invention consists in certain novel features of construction andcombinations of mechanism for rendering the locks more convenient andreliable, as set forth in detail hereinafter with reference to theaccompanying drawings.

In the drawings, Figure I is a face view of the lock with the cap-plateof the case removed. Fig. 2 is across-section on line ma of Fig. I, andthrough the latch-knobs. Fig. 3 is a transverse section on line o c ofFig. 1, and through the locking mechanism. Fig. et is a vertical sectionon line w fw of Fig. l. Fig. 5 is an end view ot' the cylinder-lock, andFigs. 6 to 9 cross-sections of-thc same. Figs. l0, ll, and 12 aredetail'cross-sections of the nightlatch mechanism. Figs. 13 to 16 showdetails of the latch mechanism.

Similar letters of reference-indicate correspondin g parts.

A is the case, similar to that of an ordinary mortiselock, andcontaining latch-bolt a, projected by a spring, a', and the locking-boltI).

c is the inner knob of the latch, and d the outside knob, containing thenight-latch mechanism. f

B is a cylinder-lock fitted in case A, for operation at either side tomove the bolt b.

I will rst describe the latch mechanism in detail with reference toFigs. 1, 2, and 4, and the detail figures, l0 to 16.

The outer knob, d, is formed with a hollow cylindrical shank, d',extending, as shown in Figs. 2 and 4, through the case A. Around theshank d', and within case A, are looserin gs ef, formed with arms ej",and engaged by the knobs for movement of the latch, as hereinafterdescribed.

g is a middle ring, formed with shoulders or arms g, and engaged by thecylinder ot' the lock contained in knob d for withdrawal ot' the latch.

h is a yoke, held in place by and tted to slide between guides g', andengaging by one of its lugs h a lug, a4, on 'the side ot' the latchbolta. 'Ihe rings cfg engage by their arms the lugs h of the yoke, and byapar-tial turn of either ring in either direction the latch a is movedback.

The inner knob, c, is upon a solid spindle, c', which passes through therose c?, by which the knob is sustained, andon the inner endot' thespindle is xed a bent arm, o3, that projects through a curved slot inthe lock-case and enters a recess, c3, formed in ring c. (See Fig. 16.)The ringe is upon an annulartlange that is around the opening formed inthe plate' vfor the lock-cylinder, so that the ring e turns on suchilange, while the rings fg are directly upon the lock-cylinder.

The spindle d passes through a rose, d2, to and against the face-plateof the lock, and is formed at its end with a projection, L2-that extendsinto a recess,f2, formed in ring j', Figs. 2 and 13, the opening in thelock-case being enlarged for the play of the projection when the knob isturned. The spindle d contains the lock-cylinder t', which at its outerend has an annular Hange takin ginto a rabbet formed in the face of knobd, while at the inner end of the cylinder thereis a screw-cap, i',which, being put on after the knob and cylinder are applied to thelock-case, retains the cylinder in the knob and the knob iu thelock, forthe rea-I son that the cap is larger than the internal diameter ot' ringe, and thus prevents withdrawal ofthe knob and cylinder. Thisconstruction permits the parts to be readily put together, and the knob,beingin onepiece with its spindle, cannot be removed except access ishad to the inner side of the door. This' is important, as it securesvaluable knobs ou street-doors from being stolen.

At the front of ring j", and between the arms of yoke h, is litt-ed aslide, 7c, having a projection, It', coinciding with a recess, k2, thatis formed in the ring f. A bent lever, Z, hung on a pivot, l', takes byone end against a projection on slide k, while its other end projectsthrough a slot in the front plate of the lock- IOO case for operation byhand to moire the slide k in connection with ringf, and thus lock theouter knob, d, so that it may not be used to move the latch, or by areverse movement ot' the slide freel the knob. A friction-spring, l2,bearin g on slide k, retains it in either position.

Thelock contained in knob d and cylinder z' is a pin-lock, of which thecylinder m fits snugly in cylinder t', and is retained therein by ascrew-pin, m', that projects through an elongated slot in the cylindert', (see Fig. 11,) so that theinner cylinder, m, may revolve. The headof pin m entersa recess, 02,in ring g, (see Figs. 2, 4, and 14,) so asto turn said ring.

From the foregoing it will be seen that the latch a is moved by theinner knob, c, acting on ring c, by the outer knob, d, acting by thering f, and by the cylinder m ofthe lock in the knob d acting on ringgby means ot' the screwpin m. Further, the knob d can be locked by theslide lf, and the latch can then be operated from the outside only byuse of a suitablefkey to turn the cylinder m.

The mechanism of the lock part of the latch is as follows, referencebeing made to Figs. 2, 10, 11, and 12: The cylinder m is recessed in itsmiddle portion, and from one end of the recess apertures extend throughthe inner end of the cylinder, while the outer end has a narrowkey-slot, m2, for receiving a lat key. The pins a (of which there arefour) extend from the key-slot to and through the inner end ot' thecylinder, and are held in place in the recess by a fixed guide-piece,m3, through which they pass. Springs n extend around the pins, betweenthe bottom ofthe recess, and collars on the pins press the pins towardthe keyslot.

At the inner end of cylinder z', next the end of cylinder m, is a block,o, fixed by a screw, n2, Figs. 2 and 10, containing four pins, o', inrecesses, that also contain springs 02, that tend to project the pins.The pins coincide in position with pins n, so that they shall enter theapertures in cylinder on asallowed by the pins n, and the cylinder m isthus held against being turned except by a key of proper form, whichwill move back the pins n 0 and free the pins o from the cylinder m.

The mechanism in connection with the locking-bolt b is next describedwith reference to Figs. 1, 3, 5, 6, 7, S, and 9.

The plates of the lockcase have circular apertures, through which passesa hollow cylinder, p, that extends also through the door at each side ofthe lockcase,and there are-r ings. p secured to the door-faces aroundthe ends of the cylinder. On the portion within the lockcase thecylinder p is enlarged by a sleeve, p2, that is itted at one end with ascrew ring or collar, q, takin g against the outside of the caseplate,so that the cylinder p, after being inserted from the outside of thedoor and the ring q put on, is held securely, and cannot be loosened bycareless or malicious handling. The ring q has notches, so that it maybe turned by a forked key inserted in the space opened by removal ofring 19', so that the parts can be readily put in place without specialskill. A screw, q', projecting from the cylinder p, takes against theinside 0f the lock-plate in opposition to ring q and enters a notch inan annular flange, q2, formed around the aperture in the lock -plate, soas to prevent the cylinder from turning, and,with the ring q, accomplishthe securityjust named.

On the flange q2, and around the cylinder p, is a ring, o', having arecess that is engaged by the head of a screw, g3, which projects fromthe lock-cylinder hereinafter described. Ring 0' is formed with anarm,1",that extends into a slot formed in bolt b. Ona stud, T5, on thebolt b is pivoted a tumbler, r2, that engages by its end a fixed stud,r3. The inner end of this tumbler is forked,one end passing in front ofthe arm 0" of ring r, and the other end passing above the arm andbeneath the end of a second tumbler, s, that is pivoted on the bolt. Oneend of tumbler s projects behind the arm t", while the other end takesover the tumbler r2, as mentioned. A spring, l9,retains the contact oftumbler r2 with stud r3.

Two dogs, s2 s2, are hung by one end to studs tixed above the bolt, sothat the ends ot" the dogs may project behind the slot in the bolt andrest at opposite sides of a lug projecting from arm i" ofthe ring. j

A flat spring, s3, taking upon the upper ends of arms r2, retains theirmoving ends upon the arm r and serves to return ring r to its middleposition in the slot. NVhen the ring is moved in one direction it firstacts on the forked end of tumbler r2 and the spring-dog, and raises thetumbler free from stud r3, and then projects the bolt by pressure on theend of the slot in the bolt. At the same time the ring moves one of thedogs s2, the spring of which returns the ring to the middle position assoon as released. The reverse movement of the ring first acts on dog s2,and then on tumbler s, and the latter, in turn, acts on tumbler r2, andthe ring then retracts the bolt.

It will be noticed that the ring, and consequently the turning cylinderof the lock contained in cylinder p, is returned to the normal positionafter each movement of the bolt, and therefore the key-slot is alwaysretained in one position, preferably vertical. rllhis is convenient, andavoids the bad appearance of a keyslot at an angle.

The cylinder p con tains a turning cylinder c: block, t, held byr, screwq, that engages with ring r. In the cylinder t are pins t', and thecylinder p contains also a block, u, titted with spring-pins u',projecting in contact with the pins t. The outer end of cylinder t has akey-slot, t2, and the operation is the same as described in connectionwith the latch-lock. In addition, I provide for turning cylinder t andmoving bolt b from the inside ofthe door, as follows: The end of block uextends flush with the end of cylinder p, and is formed with IOS IIO

IIS

a key-slot, u2. From the base of the slot, and at opposite sides, theblock is formed with longitudinal grooves that contain spiral springsn3. In the key-slot u2 there are flat pins o, that project into the sidegrooves of the block and take by shoulders upon the springs as, so thatthe springs tend to move the pins outward. The block u is also formedwith an annular groove at the base of the key-slot, in which are plateso', of segmental form, resting on the pins '0, and notched forengagement therewith. These plates o are of a width to project intoslots formed in cylinder p, and thus hold the block u from being turned,and consequently hold the cylinder t so that the latter cannot be turnedexcept when a key is used to move back the pins t' u. The pins v areheld normally by the notched plates o', and are formed with recesses w,which give clearance when such recesses coincide with thenotchesinplates c. This position is obtained by insertion of the key, and therecesses should be placed so that the same key serves for both insideand outside use. The block u being turned carries the cylinder t withit, and the bolt b is thus operated. l

The combined latch and lock above described meets all the conditionsrequired in a streetdoor lock. It is of durable construction, not liableto get out of order, and furnishes the security of a tumbler-lock inconnection with the latch as well as the bolt.

Having thus fully described my invention, I cla-im as new and desire tosecure by Letters Patentl. The combination of latch a, yoke h, knob c,and spindle provided with arm c', ring e, formed with arms e', knob d,spindle d', with its projection, and ringf, having armsf, substantiallyas shown and described, for operation as specitied.

2. The slide 7s, bent lever I, recessed ring f, knob d, spindle d', andcylinder t', containing lock mechanism for operating the latch,substantially as shown and described, combined for operation asspecified.

3. The knob d and hollow spindle d', formed integral, the loclecylinderi, and screw-cap t, combined with the lock-case A, substantially asshown and described.

4. The ring g, formed with shoulders g', lockcylinder t', and turningcylinder m, provided with screw m', combined with the hollow knobspindled', with its projection, ring f, latch a, and yoke h, substantially asshown and described, for operation of the latch, as set forth.

5. The slotted cylinder m, the screw-pin m', sprin g-pins n, block 0,spring-pin 0', and containing-cylinderl t', combined with the hollowspindle df, and knob and latch operating ring g, substantially as shownand described.

6. rlhe bolt b, tumblers r2 s, spring -dogs s2 and ring r, arm r', withlug extending thcref from, and cylinder p, containing mechanism formoving ring i, substantially as shown and described, combined foroperation as set forth.

7. The spring-dogs s2, combined with the ring o", arm r', andlug-bolt b,and cylinder-lock B, with pin Q3, substantially as and for the purposeset forth.

S. The cylinder p of the locking mechanism, screw-sleeve p2, ring 1, andpin q', combined With the lock-case, formed with recessed ange q2,substantially as shown and described.

9. The recessed fiat spring-pins c and segmental plates t', restingonthepins and notched for engagement therewith, combined with thc groovedblock u, the slotted cylinder p, and the pin g3, for operating the ringr r' of lock AB, substantially as and for the purposes set forth.

FRANCIS KEIL.

Witnesses:

GEO. D. WALKER, C. SEDGWICK.

